Machine for operating on shoe parts



5 Sheets-$heet 1 WVE/VTUF y;

MACHINE FOE OPERATING 0N SHOE PARTS Figrl April 1941.

I April 8, 1941. J. P. FREDERICKSEN MACHINE FOR OPERATING ON SHOE PARTS Filed June is, 1959 5 Sheets-Sheet 2 A/ VEN TOR: fl m Afiril 1941. J. P. FREDERICKSEN 2.237. 2

MACHINE FOR OPERATING ON SHOE PARTS Filed June 13, 1939 5 Sheets-Sheet 5 Fig.9

254 v 266 2&2 245 2% Watented Apr. 8, 1941 UNETED STATEEE PATENT OFFWE MFWHINE FOR OPERATING 0N SHQE PARTS Jersey Application June 13, 1939, Serial No. 278,892

26 Claims.

This invention relates to improvements in machines for operating on shoe parts and more particularly to machines for slashing the surface of a soleito render it more flexible.

It is common practice among shoe manufac turers to break up the surface fibers of the flesh side of an innersole with a series of transverse cuts so as to enable the sole to bend more readily and thus insure that the finished shoe will be flexible and comfortable on the wearers foot.

The machines employed to make these slashes are usually so constructed that the slashes are made substantially perpendicular to the longitudinal center line of the forepart of the sole. The normal break line of a shoe, however, does not run straight across the shoe and consequently it crosses the slashes rather than running parallel to them, so that the shoe is not as flexible as it would be if an equal number of slashes were made parallel to the break line.

It is desirable that these slashes, whether they run straight or diagonally across the forepart should be positioned as close to one another as possible, in order to secure the maximum of flexibility in the sole. machines this must be accomplished by using knives and knife holders so small that frequent breakage is apt to occur, or by use of a die.

The use of dies is not practical, however, particularly in the manufacture of welt shoes. such shoes the slashes should extend over as much of the forepart as possible, without cutting the lip or rib, and consequently a large number of dies are needed to operate properly on the various sizes, shapes and widths of soles. tion such dies are extremely difficult to sharpen because of the small amount of space between the cuttin: edges, and. when they are dulled, much care and time must be wasted in reconditioning them to cut properly.

With these considerations in View, it isan object of the present invention to provide a machine for forming a series of closely spaced slashes in the surface of a sole without the use of dies, and without the use of mechanism so small and delicate that it is liable to frequent breakage.

Accordingly, the invention provides a machine comprising a support for a sole, a group of knives to slash the surface of a sole on the support, and means for moving the knives across the sole to position them to form additional slashes in the surface of a sole. In a slightly different aspect, the invention contemplates the provision of mechanism for forming .a series of At present in multiple knife In addidiagonal slashes and means for moving the mechanism across the surface of a sole to form a second group of diagonal slashes. The word across as used herein and in the appended claims is intended to include directions both latorally and longitudinally of the sole.

The invention will be better understood when considered with relation to the accompanying drawings, in which,

Fig. 1 is a side elevation, partly in section, of a preferred embodiment of the invention;

Fig. 2 is a front elevation;

Fig. 3 is a view in vertical perspective, partly in section, of the mechanism for disengaging the clutch-releasing rod and the treadle rod;

Fig. 4 is a cross-section taken on the line IVIV of Fig. 1;

Fig. 5 is a cross-section taken on the line V-V of Fig. 1;

Fig. 6 is a plan view on a larger scale of the knife holding block;

Fig. '7 is a cross-section of the knife holding block along the line VII-VII of Fig. 6;

Fig. 8 is a side elevation of the machine provided with a modified form of head and structure for moving the knives horizontally;

Fig. 9 is a View, similar to Fig, 4, but showing the modified construction illustrated in Fig. .8.

Fig, 10 is a cross section along the line X-X of Fig. 9;

11 is a front elevation on a larger scale of the knife-carrying head of the modified form of the invention shown in Figs. 8, 9 and 10; and

Fig. 12 shows the knife and knife holder of Fig. 8.

As illustrated in Figs. 1 to 7, the invention is embodied in a machine comprising a frame 28 to the lower portion of which is bolted a supporting bed 22. A head E l carrying knives 26 is mounted on a post 263 vertically reciprocable in the frame and connected by a pitman 30 to a crank 32 on a drive shaft it. To permit horizontal sliding movement of the head on the post, a recess 36 is formed in a block 38 which form the upper part of the head 26. The flanged end 4E! of the post 28 is fitted into this recess, the block being slidably held in this position by plates 42 bolted to the block 38.

The drive shaft is operatively connected by a clutch it of the so-called Horton type to a fly wheel 53 adapted tobe driven by a belt or electric motor (not shown). The drive shaft 3 1 also carries a screw gear 43 connected through gears 5t, carried on a vertical shaft 54 to a cam 56 which operates through intervening connections v machine, partially overlie either side of the plate 58 and are slidable laterally in a recess in the bed 22. These blocks are held rigid with the bed by set screws 64, the side walls 66, 66 of the recess being undercut to prevent upward movement. To insure proper positioning of the sole S relative to the knives there are provided two lateral gages 68, held in adjusted position in dovetailed slots in the blocks 62, 62 by set screws Ill, and two toe gages I2, fastened on the plate 68 by set screws I4 (Fig. 5) which permit them to be adjusted properly.

It is obvious that the knives 26 will tend to carry the sole S upwardly with them as they begin the upward portion of their vertical reciprocation. To obviate this difficulty, the blocks 62 are slotted on their upper surfaces to receive slides I6 formed on the bottoms of two stripper plates I8. The stripper plates are provided with a series of points 80 (Fig. 5) which extend inwardly over the sole S and prevent it from being lifted more than a slight distance before they engage it and permit the knives 26 to be pulled out by the upward movement of the head 24.

As has been pointed out, the post 28 is mounted for vertical reciprocation in the frame, and carries on its lower end the head 24. The upper end of the post is bored to receive a U-shaped member 82 which is fastened therein by a bolt 84. The member 82 is pivotally connected by means of a pin 86 to the pitman 36 which is driven by the crank 32 on the drive shaft, the latter being held against any longitudinal movement relative to the frame by collars 8B.

To impart to the head a horizontal movement which will occur in timed relation to its vertical reciprocation, the screw gear 48 is provided. This gear, rigidly fixed to the drive shaft, meshes with a driven gear 56 bolted to the end of the vertical shaft 54, which latter is journaled in lugs 90, 92 in the frame. The lower end of the shaft 54 carries another gear 52 (Figs. 2 and 4) which meshes with a gear 64 carried on a shaft 96 rotatably held in place in a boring 98 in the frame by a set nut I06. The cam 56 is rigid with the gear 94 and is designed to impart horizontal movement to a cam roller I92 carried on a pin I64 on a slide rod I06. The roller is held in contact with the cam by a spring I68 connecting the slide rod and a pin IID (Fig. 4) in the rear of the frame. Rearward movement of the rod is limited by a stop I I2 held on the frame in adjusted position by a screw II4 passing through a slot into the frame.

To transmit the movement of the slide rod to the head, a vertical link H5 is formed integral with the forward end of the rod. and a pin II6, extending rearwardly from the lower portion of the link H5 and slidable in a bore H8 in the frame, provides additional support for the link as it is reciprocated horizontally by the cam. A vertical slot I is formed in the link H5, and extending through it is a pin I22 carried in ears I24 on the block 38, so that, while the head may move vertically independent of the link II5, the two must move together horizontally.

The points of the stripper plates I8 must of course be moved horizontally coincident with the movement of the head, to prevent the knives from striking them and breaking. To this end flanges I26 (Figs. 4 and 5) are provided on the lower part of the link I I5, and screws 28 passing through slots in the flanges fasten inwardly curved rearward portions I36 of the stripper plate to the flanges so that the head, the rod I66, and the stripper plates all move horizontally in unison.

To set the machine in operation there is provided a treadle (not shown) which is connected to a treadle rod I36 normally held in its uprnost position by a compression spring I32 acting between a collar I34 on the rod and an annular boss I36 on the frame 26. Since it requires two revolutions of the flywheel to complete the cycle of operation of the machine, it is desirable that two and only two revolutions should occur each time the treadle is depressed, regardless of whether it is kept depressed or is released before the cycle is complete. To this end a hook I38 (Figs. 2 and 3) formed on the upper end of the treadle rod and engaging a shoulder I46 on a clutch release rod I42, provides a breakable connection between the treadle and the clutch. A throwout latch I44 pivoted on a pin I46 in a projection I48 (Fig. 1) of the frame is arranged to move counterclockwise to disengage the shoulder I40 from the hook when the latch is struck by a pin I56 carried on the gear 94. The tendency to clockwise movement of the latch I44 caused by the inward pull of a spring I51 on the rod I42 is limited by a stop screw I62 in the frame 26. A spring-actuated locking latch I54 pivoted at I56 is arranged so as to enter a notch I58 in the clutch release rod I42 when the rod is depressed and thus hold the rod in its down position, against the upward pull of the spring I5I. A pin I62 carried by the cam 56 directly beneath the pin I 56 is arranged to disengage the locking latch I54 from the notch I58 at the same time that the throw-out latch I44 disengages the clutch-release rod so that the latter may be moved upwardly by the action of the spring I5I.

To disconnect the flywheel from the drive shaft, the clutch-release rod is pivotally connected at I64 (Fig. 2) to a lever I66 fulcrumed at I68 on the frame. The lever I66 has formed in it a shoulder I16 arranged to engage a knockout I12 on the clutch 44 which acts to positively disengage the flywheel from the shaft in the manner usual in the Horton clutch construction. A spring-pressed pin I14 acting against the lever I66 assists the spring I5I in drawing the clutch-release rod upwardly.

It is, of course, desirable that the knives 26 should be readily adjustable so that any desired pattern of slashes may be made. To this end, the knives are provided with upwardly extending shanks I 16 (Figs. 6 and 7) which are threaded and extend through slots I'i8 formed in blocks I80. The shanks I16 of the knives are held rigid with the blocks I86 by nuts I82, I84. By loosening these nuts, the knives may be adjusted lengthwise of the slot H8 or may be turned to alter the angle at which they slash the sole S.

The blocks I80 are formed with tongues I86 (Figs. 1 and 2) on their outer sides. These tongues I66 fit into corresponding grooves I88 in blocks I90, and are held therein by screws I62, longitudinal adjustment of the blocks I86 being permitted by slots I84. The blocks I90 are slidable in a dovetailed recess I96 in the block 38, and are bored to receive the threaded ends of adjusting screws I98. The adjusting screws I88 are fixed for rotating but not lpngituolinal movement in plates 200 screwed to the block 30, so that, by turning them, the two sets of knives may be moved toward or away from each other.

In operating the machine the sole S is placed on the plate 58 beneath the knives 26, its position having been previously determined by adjustment of the gages 68 and 12; The operator then treadles the machine, depressing the treadle rod I30 and the clutch-release rod I42 until the springpulled locking latch I54 enters the notch I58 in the clutch-release rod, and holds it down, regardless of whether or not the treadle remains depressed. The clutch-release rod pulls the shoulder I10 on the lever I66 out of engagement with the knock-out I12 permitting the flywheel to pick up the rolls of the clutch 44 which connect it to the drive shaft 34. The crank 32 drives the knives downward forcing them into the sole S to form in it a sereis of slashes, the arrangement of which is determined by the adjustment of the knives. v

The drive shaft is also, during this period, turning the cam 56 which is so designed that it imparts no horizontal movement to the knives until they have almost completed one vertical reciprocation. It may be noted here that the gears 94 and 52 are constructed to have a ratio of two to one so that two revolutions of the flyknives to make a second series of slashes in the u sole a slight distance from the first group.

At this point also the pins I50 and I62 strike the throw-out latch I44 and the locking latch I54, respectively, and disengage the clutchrelease rod from the treadle rod, permitting the former to be raised by the action of the springs II and I14. The knock-out I12 has by this time, however, passed the point where it will engage the shoulder I to stop the machineafter one revolution and hence the flywheel will not be disengaged from the drive shaft until the knockout and the drive shaft have made a second complete revolution. By this structure, the release of the clutch rod I42 is insured, regardless of V whether or not the trcadle is released, so that stopping of the machine on completion of the second revolution is made certain. Conversely, the locking latch prevents the shoulder I10 from striking the knock-put I12 at the completion of one revolution of the drive shaft, thus insuring that two and only two revolutions of the flywheel will be made each time the treadle is depressed.

Figures 8 through 12 illustrate the invention in a modified form, which while similar in many respects to that already described, provides a different head and knives, and an alternative structure for moving the knives across the sole. The sole-supporting structure is essentially alike in both forms except that here there is no necessity for providing means for moving the stripper plates across the sole simultaneously with the head. It comprises simply two blocks 202 afllxed in adjusted position to the bed '22 by bolts 204, the stripper plates 206 and the gages 50 being fastened in adjusted position to the blocks I88 by double screw arrangements 208.

The mechanisms for imparting vertical reciprocatory movementv to the head 2I0, for rotating the gear 52, and for disengaging the clutchrelease rod are also similar to those already described. The gear 94 however is integral with a disk 2I2 having in its lower face a cam groove 2I4, which is engaged by a cam roller 2I6 carried on one end of a lever 2I6 fulcrumed on a stud 220. This fulcrum stud is journaled in a block 222, which is slidable in a slot 224 formed lengthwise in the lever 258, and adjustment screws 226 are provided for moving the block lengthwise of the lever to vary the fulcrum point and thus regulate the horizontal movement of the knives 221. Set screws 228 prevent slipping of the adjusting screws.

The end of the lever 2I8 carries a pivot screw 230 to connect it to a link 232. The other end of the link 232 is slotted longitudinally, and through the slot passes a screw 234 connecting the link 232 to a second link 236 in such a manner that the effective length of the link 232 may be varied by loosening the screw 234. The other end of the link 236 isforked to fit over a vertical rear portion 238 of an arm 240. A slot 242 is formed in the vertical portion 238 and through it extends a pin 244 which also passes through the forked end of the link 236 so that the arm 240 may move vertically relative to the link 236, but any horizontal movement of th link will be transmitted to the arm 240.

The head 2 I 0, as has been pointed out, is carried on the lower end of the post 28 and comprises a block 245 in the bottom of which is formed a recess 246 (Fig. 11). A block 241 is slidable longitudinally in the recess, the side walls 248 of the latter being undercut to hold it in place. To adjust the block 241, there is provided an adjusting screw 250 threaded into a lug 252 on the block 241. A plate 254 attached to the front end of the block 245 by screws 256 is slotted to fit between two flanges 251 on the shank of the screw 258 and hold it against lengthwise movement, so that when the screw is turned, the block 241 is moved forward or back in the recess 246.

The knives 221 (best seen in Figs. 11 and 12) are carried in knife holders 258 and are arranged in pairs with the cutting edges of each pair face to face, so that when forced into the sole S, they will form a single continuous cut. Set screws 260 holding the knives in place permit the latter to be adjusted relative to each other to regulate the length of the cut as desired. Each of the holders 258 has a shank 262 extending upwardly from its upper surface through a bore 254 in the block 241. The end of the shank 252 is threaded to receive a nut 266, which loosely fastens the holder 258 to the block 241 in order that the holder and knife may be pivoted about the shank as a center.

To rotate the knives, each of the holders is provided with an arm 268 pivotally connected by a bolt 210 to the arm 240, in such a way that the horizontal movement of the latter causes the knives to pivot. It will be noted that the distance between shanks 262 is the same as the distance between bolts 210 and that the knives are and will remain parallel, regardless of the position to which they are rotated.

In operating the machine a sole is placed on the bed 22 in the position determined by the gages 68, 12. The operator then treadles the machine, setting the reciprocable head in motion to move the knives downwardly to form a series of diagonal cuts in the sole. When the first series of cuts has been completed, the cam acting through the cam roller H6 and the links 232 and 236 operates to pull the arm 240 rearwardly so that the knives, pivoting to a predetermined extent about the shanks 262 are moved across the surface of the sole to the position indicated by broken lines in Fig. 9. The head is then again automatically reciprocated to force the knives into the sole and form a second series of diagonal cuts, thus producing a group of intersecting angular slashes in the forepart of the surface on the sole.

From the foregoing description it will be readily seen that there has been provided a machine for slashing the surface of a sole which is extremely adaptable and may be used on soles of all types and sizes by making a few simple adjustments. It is to be noted that the use of the machine is not confined to the formation of diagonal cuts but that the knives may be adjusted to form a series of cuts normal to the longitudinal center line of the forepart of the sole or at any angle to that line that may be desirable in view of the particular shoe being manufactured.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent of the United States is:

1. In a machine for slashing soles, a support for a sole, a gang of knives, means for reciproeating said knives to cause them to make a group of slashes in a sole in said support, means for imparting to said knives movement lengthwise of said sole to position them to form a second group of slashes in said sole overlapping said first group.

2. In a machine for slashing soles, a work support, a gang of knives, means for effecting successive reciprocations of said knives, automatic means for moving said knives lengthwise of said sole between reciprocations to position them to form a group of slashes overlapping the slashes formed by a previous reciprocation of said knives, and means for stripping a sole from said knives.

3. In a machine for slashing soles, a work support, a head, a gang of knives carried in said head, means for holding a sole in fixed position on said support, means for effecting successive reciprocations of said knives thereby to slash the surface of a sole on said support, and automatic means for shifting said knives longitudinally of the sole between reciprocations of the head to position them to form a group of slashes in said sole overlapping the slashes formed by a previous reciprocation of said head.

4. In a machine for operating on soles, a work support, a head, a tool carried in said head, means for holding a sole in fixed position on said support, means for effecting successive reciprocations of said tool, driving means for said reciprocating means, automatic means for imparting to said tool movement lengthwise of said sole between reciprocations of the tool, and means for disconnecting said driving means from said head after a predetermined number of reciprocations thereof.

5. In a machine for operating on shoe parts, a work support, a head, a tool carried in said head, means for effecting successive reciprocations of said tool, driving means for said reciprocating means, a cam connected to said driving means and constructed and arranged to transmit transverse movement to said tool, and means actuated by said cam for disengaging said driving means from said reciprocating means after a predetermined number of reciprocations thereof.

6. A machine for slashing soles comprising a work support, a head, a knife carried in said head, means for effecting successive reciprocations of said knife, automatic means for imparting to said knife movement lengthwise of said sole between reciprocations thereof, means for separating a sole from said knife, driving means for said reciprocating means, a clutch constructed and arranged to connect said driving means to said reciprocating means, and automatic means for releasing said clutch at the end of a predetermined number of reciprocations of said knife. 7. A machine for slashing soles comprising a work support, a head, a knife carried in said head, a drive shaft, a crank on said drive shaft, an arm connecting said head and said crank, a cam, means for connecting said drive shaft and said cam, means actuated by said cam for transmitting transverse movement to said knife between reciprocations thereof, a flywheel, a clutch constructed and arranged to connect said flywheel to said drive shaft, a clutch release rod, a treadle rod connected to said clutch rod, automatic means for disengaging said treadle rod from said clutch rod, and means for preventing said clutch from being released until said knife has completed a predetermined number of reciprocations.

8. A machine for rendering soles flexible comprising a work support, a head, a gang of knives carried by said head and constructed and arranged to form a group of slashes in a sole on said support, means for effecting successive reciprocations of said knives, and automatic means for moving said head lengthwise of said sole and transversel of said knives between reciprocations thereof to position said knives to form a second group of slashes in the sole overlapping said first group.

9. A machine for rendering soles flexible comprising a work support, a head, a plurality of knives carried by said head and constructed and arranged to form a series of cut in one portion of the surface of a sole on said support and at an angle to the center line of the sole, and automatic means for shifting said knives relative to said sole to form a second series of angular slashes in another portion of said sole overlapping said first-mentioned portion of the sole.

10. A machine for rendering soles flexible comprising a support for a sole, a head, a plurality of knives carried by said head and constructed and arranged to make a series of slashes diagonal to the center line of a sole on said support, means for effecting successive reciprocations of said knives, and means for moving said head across said sole transversely of said knives between reciprocations thereof to position said knives to form a second series of diagonal cuts in the sole.

11. A machine for rendering soles flexible comprising a support for a sole, a head, a plurality of knives carried by said head and constructed and arranged to make a series of intersecting slashes at an angle to the center line of a sole on said support, mean for imparting successive cutting strokes to said knives, and automatic means for moving said knives across the surface of the sole between cutting strokes of said knives.

12. A machine for rendering soles flexible comprising a support for a sole, a head, a plurality of knives, means for adjustably mounting said knives in said head, means for reciprocating said head to cause said knive to penetrate a sole in said support, and means for shifting said head lengthwise of said sole in timed relation tothe reciprocating movement of said head.

13. In a machine for rendering soles flexible, a plurality of slashing knives, means for eifecting successive reciprocations of said knives, stripper means for separating a sole from said knives, and means for moving said knives and said stripper means across the surface of a sole between reciprocations of said head.

14. A machine for rendering soles ilexible comprising a Work support, means for positioning a sole on said support, a head, a plurality of knives carried by said head and constructed and arranged to form a series of cuts in the surface of a sole, means for effecting successive reciprocations of said knives, means for disengaging the sole from said knives, and means for moving said head and said disengaging means across the surface of the sole between reciprocations of said head.

15. A machine for rendering soles flexible comprising a head, a plurality of knives carried by said head and constructed and arranged to form a series of diagonal slashes in the surface of a sole, means for effecting successive reciprocations of said head, means for moving said head across the sole to position said knives to form a second series of angular cuts, means for positioning said sole relative to said knives, driving means connected to said reciprocating means, and means for disconnecting said driving means from said reciprocating means after a predetermined number of reciprocations thereof.

16. A machine for rendering soles flexible comprising a support for a sole, a head, a plurality of knives constructed and arranged to form intersecting slashes in a sole on said support, means for adjustably mounting said knives in said head whereby said knives may be adjusted laterally relative to the sole, means for effecting successive reciprocations of said head, and means for moving said head lengthwise of the sole between reciprocations of said head to position said knives to form additional slashes in the sole.

17. A machine for rendering soles flexible comprising a work support, a head, a group of parallel knives carried in said head, a second group of parallel knives carried in said head at an angle to said first group, means for effecting successive reciprocations of said head, and means for moving said head across the surface of a sole on said support between reciprocations of said head.

18. A machine for operating on shoe soles comprising a support for a sole, a reciprocating knife constructed and arranged to slash the surface of a sole in said support, automatic means for rotating said knife to a predetermined position between reciprocations, and means for holding a sole in fixed position on said support.

19. A machine for operating on shoe soles comprising a work support, means for positioning a sole on said support, a reciprocating head, a plurality of knives pivotally mounted in said head and constructed and arranged to slash the surface of a sole on said support at an oblique angle to the longitudinal center line of the forepart thereof, and means for turning said knives to a predetermined position to position them to form a second series of cuts in said sole.

20. A machine for operating on shoe soles comprising a reciprocating head, a plurality of knives pivotally mounted in said head and constructed and arranged to slash the surface of a sole, automatic means for rotating said knives to a predetermined position to position them to form a second series of cuts in said sole, and means for disengaging said sole from said knives.

21. A machine for operating on shoe soles comprising a head, a plurality of knives constructed and arranged to form a series of cuts in the surface of a sole, means for pivotally mounting said knives in said head, means for rotating said knives to form a second series of cuts in said sole, means for positioning said sole, driving means for imparting a cutting stroke to said knives, and automatic means for disconnecting said driving means from said knives after a predetermined number of cutting strokes thereof.

22. In a machine for operating on shoe soles, a work support, a reciprocating head, and a pair of knives pivotally mounted in face to face relation in said head and constructed and arranged to form a single continuous cut in the surface of a sole on said support.

23. In a machine for operating on shoe soles, a reciprocating head, a holder pivotally mounted in said head, and a pair of knives mounted in said holder in overlapped relation to each other and constructed and arranged to form a single, continuous cut in the surface of a sole, said holder being constructed and arranged to per- Init adjustment of said knives relative to each other to vary the length of the cut.

24. A machine for operating on shoe soles comprising a reciprocating head, a knife pivotally mounted in said head, an arm constructed and arranged to rotate said knife, and a cam connected tosaid arm and constructed and arranged to actuate said rotating arm in timed relation to the reciprocatory movement of said knife.

25. A machine for operating on shoe soles comprising a support for a sole, a reciprocating head, a plurality of knives constructed and arranged to form a series of angular slashes in a sole in said support, means for pivotally and adjustably mounting said knives in said head, whereby said knives are adjustable laterally and longitudinally with relation to said sole, and means for rotating said knives in timed relation to their reciprocal movement.

26. A machine for operating on shoe soles comprising a reciprocating head, a plurality of knives carried in said head, means for rotating said knives relative to said head, a cam connected to said rotating means, a drive gear connected to said cam, a clutch, a clutch release rod, a treadle rod connected to said clutch rod, means for disconnecting said clutch release rod from said treadle rod, and means for preventing said clutch from being released until said drive gear has completed a predetermined number of revolutions.

JAMES P. FREDERICKSEN. 

